I was actually kinda disappointed in this episode. It didn't feature any action that we couldn't already have guessed (although Hurley seeing Jacob's house was wild) and the flash-forward was more interesting than the actual events on the island. The only surprise was that it was Hurley and not Locke or Desmond who galvanized the group to distrust the freighter people.
My analysis for what we've seen so far: we know that Claire and Aaron get on a helicopter which Desmond claims is a "rescue" helicopter and he is rarely wrong in these matters. So that would make the O6 Jack, Kate, Hurley, Claire, and Aaron plus 1 other. My vote is for Michael or Walt. (although in that case, you're left with the question of what happens to Sun and the baby)
Judging from what we've seen so far, I think that the Oceanic 6 are lying about there being other survivors of the plane crash. I think that they tell the rest of the world that everyone else died when in reality, the Freighters either kill a substantial portion of them, or are holding them hostage on the island. Since we know that Ben, at least, knows how to get information on and off the island, my guess is that the Freighters threatened to kill/otherwise punish some of our heroes unless those who were sent off the island kept up the story.
In this case, it leaves open the possibility that Jack and Co. will seek out Penny Widmore to get back on the island, probably just as the credits for season 4 were starting to roll. Of course now since we only have 8 episodes, what they'll do or where we'll be left in the story is anyone's guess.
In spite of the criticisms, however, so excited to be "back on the island."